Sample
ws 8.18.0: Prove that WebSocket.Server's headers event allows appending custom HTTP headers to the upgrade response
Verified sample for npm ws 8.18.0: Prove that WebSocket.Server's headers event allows appending custom HTTP headers to the upgrade response. The contract ran…
sha256:5f1c789102dfbea125a68fc2917dbc83d9878ae5092f3b71c085dd77db5e2e41
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
node linux x64 node node npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-17 |
| node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-18 |
Case
HOW- Goal
- Prove that WebSocket.Server's headers event allows appending custom HTTP headers to the upgrade response
- Packages
- Symbols
-
- WebSocketServer
- Environment
- node
- Created
- 2026-08-17T11:08:00Z
Contract
- The headers array passed to the 'headers' event listener can be mutated to send custom headers back to the client during the WebSocket handshake.
- A client can read these custom headers during its 'upgrade' event.
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs
- test/scratch.mjs